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nickc(at)mtaonline.net
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 Posted: Tue Dec 04, 2012 10:15 am Post subject: Tail reinforcement... revisited |
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Hello Kolber’s,
I thought I would take advantage of this quite time on the list to ask about tail reinforcement, to support the tail wheel. From what I read in the archives, it sounds like not everyone thinks reinforcement this is necessary.
If you have reinforced your tail to support the tail wheel, could you tell what you have done, and post a picture ( reduce file size) please.
Thanks,
Nick Cassara
Palmer, Alaska
607AK
Might be the farthest North, but Henry is much further West!
[quote][b]
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Tue Dec 04, 2012 2:57 pm Post subject: Tail reinforcement... revisited |
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I thought I would take advantage of this quite time on the list to ask about
tail reinforcement, to support the tail wheel. From what I read in the
archives, it sounds like not everyone thinks reinforcement this is
necessary.
If you have reinforced your tail to support the tail wheel, could you tell
what you have done, and post a picture ( reduce file size) please.
Thanks,
Nick Cassara
Hi Nick C/Kolbers:
Are you inquiring about tail post braces? or support for the tail wheel?
For me, bracing the tail post was a necessity, unless I wanted to continue
to make temporary fixes when it broke. It had broken 3 or 4 times over the
years.
In addition to bracing the tail post, we welded up a 4130 lower vertical
stabilizer with a 4130 saddle to attach it to the bottom of the tail boom.
Never had a problem in this department. However, I broke the lower vertical
stabilizer aluminum leading edge tube on the Factory MKIII many years ago at
Oshkosh.
Most folks think the tail wires are "tail braces". Tail wires are spacers.
They keep the horizontal stabilizer and vertical stabilizer in position
only. The only bracing on the tail post is the two welds on the rear tail
boom ring that attach it to the bottom tube socket of the upper vertical
stabilizer and the top tube socket of the lower vertical stabilizer.
The two braces from the ring to the bottom of the tail post lock the tail
post to the tail boom ring. I have flown a lot of hours since we made this
mod some years ago. No more cracked tail posts.
Let me know if I need to clarify anything.
john h
mkIII
Titus, Alabama
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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lcottrell
Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or
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| Posted: Tue Dec 04, 2012 4:23 pm Post subject: Tail reinforcement... revisited |
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I got away without a brace for about 450 hours. It is simple and easy to do if you do it before it breaks. A little tougher if you wait. :-)Larry
On Tue, Dec 4, 2012 at 11:14 AM, Nick Cassara <nickc(at)mtaonline.net (nickc(at)mtaonline.net)> wrote:
| Quote: |
Hello Kolber’s,
I thought I would take advantage of this quite time on the list to ask about tail reinforcement, to support the tail wheel. From what I read in the archives, it sounds like not everyone thinks reinforcement this is necessary.
If you have reinforced your tail to support the tail wheel, could you tell what you have done, and post a picture ( reduce file size) please.
Thanks,
Nick Cassara
Palmer, Alaska
607AK
Might be the farthest North, but Henry is much further West!
| Quote: |
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Dennis Thate
Joined: 18 Nov 2010
Posts: 362
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| Posted: Tue Dec 04, 2012 10:46 pm Post subject: Re: Tail reinforcement... revisited |
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Rebuild the lower tail fin with a heavier steel gusset and thicker wall tubing. Which will support a full swivel locking tail wheel.
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Wed Dec 05, 2012 6:13 am Post subject: Tail reinforcement... revisited |
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Rebuild the lower tail fin with a heavier steel gusset and thicker wall
tubing. Which will support a full swivel locking tail wheel.
Dennis T/Kolbers:
The above is ok for a temporary fix. Eventually, the tail post will break
again. With larger and heavier repairs on my MKIII, we continued to
experience failures until my friend Dan Horton came up with the idea of two
external struts which create triangles that laterally brace the tail post.
Looks like lateral stress from ground handling is the culprit breaking our
tail posts.
Struts can be fabricated using 4130 or aluminum strap or tubing, and
attached with 3/16 bolts. No need for welding which creates a need for
paint and fabric repair.
Has anyone had a tail post failure after installing external struts?
john h
mkIII
Titus, Alabama
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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neilsenrm(at)gmail.com
Guest
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| Posted: Wed Dec 05, 2012 7:44 am Post subject: Tail reinforcement... revisited |
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I added 1/8 by 1 inch aluminum straps one on each side (like John suggested) to better control the tail wheel stress on my VW powered MKIIIC. I'm a big believer of learning from others. I figured the two straps one acting in tension in each direction would be enough to strengthen the tail post. I have about 400 hours on the fix with no issues. I also have been criticized a few times about abusing the tail with aggressive ground handling on rough ground.
Rick Neilsen
Redrive VW Powered MKIIIC
On Wed, Dec 5, 2012 at 9:12 AM, John Hauck <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)> wrote:
[quote]--> Kolb-List message posted by: "John Hauck" <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)>
--> Kolb-List message posted by: "Dennis Thate" <retroman(at)frontier.com (retroman(at)frontier.com)>
Rebuild the lower tail fin with a heavier steel gusset and thicker wall
tubing. Which will support a full swivel locking tail wheel.
Dennis T/Kolbers:
The above is ok for a temporary fix. Eventually, the tail post will break
again. With larger and heavier repairs on my MKIII, we continued to
experience failures until my friend Dan Horton came up with the idea of two
external struts which create triangles that laterally brace the tail post.
Looks like lateral stress from ground handling is the culprit breaking our
tail posts.
Struts can be fabricated using 4130 or aluminum strap or tubing, and
attached with 3/16 bolts. No need for welding which creates a need for
paint and fabric repair.
Has anyone had a tail post failure after installing external struts?
john h
mkIII
Titus, Alabama
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